A method for the preparation of retigabine starting with intermediate III is disclosed, comprising the step of protecting the secondary amine of III with a protecting group followed by N-ethoxycarbonylation of the primary amino group of the product obtained. The preparation of retigabine is completed by steps comprising removal of the protecting group and reduction of the nitro group to amino, which can be performed in any order or simultaneously. Novel intermediates usable with said method are also described.
揭示了一种以中间体III为起点制备雷替加宾的方法,包括以下步骤:用保护基保护III的次要胺,然后对所得产物的主要
氨基进行N-乙氧羰基化。雷替加宾的制备通过包括去除保护基和将硝基还原为
氨基的步骤完成,这些步骤可以按任何顺序或同时进行。还描述了可与该方法一起使用的新型中间体。